MT9072 Zarlink Semiconductor, Inc., MT9072 Datasheet - Page 211

• Manufacturer Part Number: MT9072
• Description: Octal T1-E1-J1 Framer
• Manufacturer: Zarlink Semiconductor, Inc.

Advance Information
16.2.12
Table 193 describes the bit functions of each (5 registers in total, one register for each bit position) of the
Receive National Bits Data Registers in the MT9072. Each register is repeated for each of the 8 framers.
Framer 0 is addressed with Y=0, Framer 1 with Y=1, Framer 2 with Y=2 and so on up to Framer 7 with Y=7
(where Y represents the 4 most significant address bits (MSB) A11-A8). Each register contains one byte (8-
bits) of data corresponding to eight frames of a particular bit position in timeslot 0. There are 5 registers in total
containing 5 bytes of data, occupying addresses YC0 to YC4 Address YC0 corresponds to bit position 4
(RN0=Sa4) and address YC4 corresponding to bit position 8 (RN4=Sa8).
A (0), (1) or (#) in the “Name” column of these tables indicates the state of the data bits after a reset (RESET,
RSTC or RST). The (#) indicates that a (0) or (1) is possible.
15-8
Bit
7
6
5
4
3
2
1
0
RNnF13
RNnF15
RNnF11
RNnF1
RNnF3
RNnF5
RNnF7
RNnF9
Receive National Bit RN Data Registers (YC0- YC4) Bit Functions
Name
(####
####)
(0000
0000)
not used.
Receive National Bit RNnFm (n = 0 to 4, m = 1, 3, 5 etc. to 15). This bit is received from
the PCM30 link, in bit position n+4 of Timeslot 0 during Frame m (non-frame alignment
signal (NFAS) frames) when CRC-4 multiframe alignment is used, or of consecutive odd
frames when CRC-4 multiframe alignment is not used.
Bit RNnFm is sourced to register address YCn as follows.
RN0Fm = Address YC0 corresponds to receive national bit Sa4Fm
RN1Fm = Address YC1 corresponds to receive national bit Sa5Fm
RN2Fm = Address YC2 corresponds to receive national bit Sa6Fm
RN3Fm = Address YC3 corresponds to receive national bit Sa7Fm
RN4Fm = Address YC4 corresponds to receive national bit Sa8Fm
(n = 0 to 4) Data Register (R/W Address YC0 to YC4) (E1)
Table 194 - Receive National Bits (Sa4 - Sa8) RNn
Functional Description
MT9072
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